I'll show you the progress of my leftovers blanket. Approximately one third is done. I knit every day at least one diamond, rather more. It's really incredibly fun. And it's amazing how something totally beautiful result in assembling knitted diamonds together from wool which have a lack of quality, texture or color. The blanket is for my daughter and she likes it, so it is also OK for me.

Here you can see how I am adding a diamond at the right edge. Cast on the required number of stitches (in my case a diamond has 33 stitches, 16 left and right, and 1 stitch in the middle), so 16 stitches. The 17. stitch (= center stitch) knit directly to the matching diamond of the previous round at the peak and knit 16 more stitches out of the diamond. Easy peasy :)